5. For each of the following pairs of transitions, state which you would expect to be more intense, andwhy?"A2 → E or "A2 → 'E in Cr(C2O4);'Ag "T2g in NICI,“ or 'T → *T2 in NİCL?I.П.III.'Aig → 'T2g in Co(NH3),** or 'A, → 'E in [Co(en);]3+

To accept a transition we should follow some rules , these are known as selection rule. Selection…

5. For each of the following pairs of transitions, state which you would expect to be more intense, and why? I. "A2 → "E or "A2 → E in Cr(C:Os)s* 'A → Tag in NiCl“ or 'T →'T2 in NiCl? 'Ag→ 'Tg in Co(NH;)" or 'A, → 'E in [Co(en);]*+ П. III.

5. For each of the following pairs of transitions, state which you would expect to be more intense, and why? I. "A2 → "E or "A2 → E in Cr(C:Os)s* 'A → Tag in NiCl“ or 'T →'T2 in NiCl? 'Ag→ 'Tg in Co(NH;)" or 'A, → 'E in [Co(en);]*+ П. III.

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy

Section: Chapter Questions

Problem 77GQ: Sulfur undergoes a phase transition between 80 and 100 C. S8(rhombic) S8(monoclinic) rH = 3.213...

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Question

5. For each of the following pairs of transitions, state which you would expect to be more intense, and
why?
"A2 → E or "A2 → 'E in Cr(C2O4);
'Ag "T2g in NICI,“ or 'T → *T2 in NİCL?
I.
П.
III.
'Aig → 'T2g in Co(NH3),** or 'A, → 'E in [Co(en);]3+

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1-A:-Calculate the energy and wave-length of the photon absorbed when a "Hg"Cl molecule (r. 2.23°A) makes the rotational transition J-0-J-1 and J-1->J=2. B:- In what region of the electromagnetic spectrum are these lines found? 2-Suppose that the equilibrium separation in the '11"CI molecules is the same and equal to 1.27°A. Compute for each molecule A:-The constant 13. B:- The energy of the first two excited rotationa levels. C:-The frequencies and wave length corresponding to the transition J-0-J-1 and J-1-J-2.
3. Two particles with spin states |2 - 2) and 1 1), are placed in a box. Identify the possible values of total spin s that would be measured and the probability of each.
1B. Explain how a vibrationally excited molecule is able to withstand up a billion of collisions without losing its excitation.
please help
2. The following is the relative number of molecules in the vibrational states of the 1CI molecule determined from spectroscopy: Vibrational level E, E, E, E, E, E, Relative Population 100 53.5 28.6 15.3 8.2 4.4 Calculate the temperature of the sample given that the vibrational frequency is 1.15 x 10"s'.
iuon a Jotamerd tion 2AJ(S) + 3 Hzsou(cnो ->PIo. (S०५)2)07 ) + 3Hac3) जाणe जयार Joovchcadl प्रावd + AIनSoq) 3ुका ? when li18 mod of Ad ieactd with 1:14 mod of H2So4.
But molecules combine both vibrational and rotational states in such a way that both selection rules must be satisfied if we are only talking about absorption or emission of electromagnetic radiation (i.e. photons). 5 1 images from Krane Ch 9. Relative absorption : 0.330 L=3 to L=2 L=2 to L = 1 Electronic excited state. Electronic ground state L→ L-1 L = 1 to L = 0 Ť 0.340 0.350 SE Energy (eV) 2B 0.360 : hf L=0 L=1 L=2 to to to L = 1 L = 2 L = 3 Photo 4 1 3 1 2 1 1 0 1 1 5 0 4 0 30 20 1 0 0 0 LN L→ L+1 0.370 0.380 no emission here because AL # 0, AL = +1 AN = ±1, HCI spectra. In the middle of the gap is the energy hf that would correspond to a pure vibrational transition, which would violate the rotational selection rule. What is the value of hf for the HCI spectra?
In the reaction of 1 nitrogen atom with 1 oxygen atom, is there an electronic contribution to the reaction con- stant? Briefly reason.
14. Which labeled proton is most acidic in the following Lewis structure?
Sulfur undergoes a phase transition between 80 and 100 C. S8(rhombic) S8(monoclinic) rH = 3.213 kl/mol-rxn rS = 8.7 J/K mol-rxn (a) Estimate rG for the transition at 80.0 C and 110.0 C. What do these results tell you about the stability of the two forms of sulfur at each of these temperatures? (b) Calculate the temperature at which rG = 0. What is the significance of this temperature?
Order the following carbon-carbon bonds in order of increasing vibrational frequency (lowest to highest in cm-1) I C=C 0 0 0 0 | < ||| < || || < ||| < | || < | < ||| ||| < || < | II C-C III C=C
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